Grease-cup.



A. C. PAULSMEIER.

GREASE CUP.

APPLICATION FILED JULY 8,1912.

1,101,952, 1 Patented June 30,1914

, l 1 Q VAI 77A A WITNESSES: R INVENTOR i N @Mefawwwfe ORNE? UNITEDSTATES PATENT OFFICE.

ALBERT C. PAULSMEIER, 0F ALAMEDA, CALIFORNIA, ASSIGNOR.T0 BYRON JACKSONIRON WORKS, OF WEST BERKELEY, CALIFORNIA', A CORPORATION OF CALIFORNIA.

GREASE-CUP.

Specification of Letters Patent.

Patented June 30, 1914.

To all 'whom t may concern:

Be it `known that I, ALBERT C. PAULS.- MniER, a citizen of the UnitedStates, residing at Alameda, in the county of Alameda and State ofCalifornia, have invented new and useful Improvements in Grease-Cups, ofwhich the following is a specification.,

This invention relates to a grease cup, and particularly pertains to agrease cup or lubricant receptacle, which is especially adapted for usein connection with centrifugal pumps.

It is the object of this invention to provide agrease cup of suchcharacter that no air can find its way through the grease into thebearing, and thereby disturb the vacuum of the pump.

Another object is to providea lubricant 1 receptacle for centrifugalpumps in which the lubricant can not be drawn therefromI by the suctionof the pump.

The invention resides in mounting'an aii tight cap on the grease cup,and forming the cup with an air-tight tubular extension in which `thestem of the grease cup piston is guided.

The invention further consists of the parts and the construction andcombination of parts as hereinafter more fully described and claimed,having reference to the accompanying drawings, in which- 'Figure 1 is avertical section of the invention partly in elevation. Fig. 2 is ``aview in longitudinal section of a, centrifugal pump, showing theinvention' as applied in elevation.

In the drawings A represents the eylin drical walls of the grease cupwhich terminate in a convergent bottom 2, having the usual threadednipple 3'formed thereon.

The nipple 3 is provided with the usual ease delivery passa-ge 4, thearea of which 1s regulated by means of a valve comprising a threadedplug 5 mounted in the nipple 3, and which .plug is formed with a transversely extending perforation conforming to and registering with thepassage` 4. B) turning the plug 5 in its threaded mounting theperforation therein may be caused to register with the passage 4, or bethrown out ofl alinement therewith, so 'that the outer wall of the plug5 will obstruct the passage 4 to any desired extent. I Formed on the up.per end of the cylinder A is an outwardly extending annular flange 6,whlch is -helical. spring 13, which surrounds the stem 10 and bearsbetween the cap 8 and the piston 11 in such manner as to normally bearagainst the piston 11'to move it downwardly away from the cap 8, whenvthe spring 13 is depressed.

In the' application of the invention, vthe grease cup A is attached tothe bearing 14 on the vacuum side of a centrifugal pump 15, in the usualmanner; the threaded nipp'le 3 being screwed into a correspondinglythreaded perforation formed in the bearing 14which registerswith aperforation 16 in a bushing 17 in which the pump shaft 18 rotates. Theperforation 16 in the bushing 17 leads to a grease-space 19 formed bvthe -bushing 17, the end wall of the bearing 14 The cap 8 and and theend of the shaft 18. piston 11 being removed, the cup A and the chamber19 are filled with a suitable grease, or other lubricant, whereupon thepiston 11 is inserted in the upper end of the grease cup A, on top ofthe grease therein. The threaded flange 7 on the cap 8 is then engagedwith the threaded flange 6 on the grease cup A, and .is screwed tightlythereon; a leather gasket 20 being disposedv between the outer end ofthe grease cup vand Vthe inner wall of the cap 8 to form a tight jointat this point. A screwed into position on the cup A, depresses thespring 13 so thatl it will exert a pressure on the piston 11, whichpressure will be transmit-ted to the grease "1n the grease cup throughthe cup-leather 12. When the grease cup is first filled, the piston 11will be positioned in the upper end of the grease cup A with its stemextending into the tubular extension 9 on the. cap 8, 105

as indicated in dotted lines in Fig. 1. n

,In the operation., ofthe invention, the spring 13 acts to force thegrease in the grease cup A below the piston 11 and cupleather 12, intothe grease chamber 19 110 The cap 8 on being4 oov n moines through thepassage 4 and perforation 16; the grease being fed slowly into thegrease chamber i9, as it is drawn from the latter by the rotation of theshaft 18, in the usual manner. It will be observed that as the piston l1is moved downward, a vacuum is formed between the upper' portion of thepiston and the cap 8, for the reason that no air to brealr the vacuumcan enter the cup through the cap. This vacuum above the piston 11 willbe practically equal to that formed below the piston by the action ofthe centrifugal pump, thereby counteracting the tendency of the pump topull upon the bottom ofthe piston by suction. By mounting the pistonstem 10 in an inclosed guide, no air can enter the cup therearound. ltis manifest that as no air can enter the grease cup A, no air will bedrawn into the interior of the pump therethrough to disturb the vacuumof the pump, and that as no air can enter the cup to displace thegrease, an excess quantity of grease will be prevented from being drawnfrom the cup A by the suction of the pump.

Having thus described 'my invention, what l claim and desire to secureby Letters Patent, iS-

A lubricator for centrifugal pump bearings comprising a lubricantreceptacle provided with an opening leading to said bea-ring, means forobstructing said opening to any desired extent, a piston in saidreceptacle arranged to follow the lubricant as it feeds through theopening, said piston f0rm ing an air tight joint with the Walls of thereceptacle, an air tight cover for said receptacle, a leather gasketbetween said air tight cover and the ends of the cylindrical walls ofthe lubricant receptacle to form an air tight joint, a hollow tubularextension formed integral with said cover, the lower end of said tubularextension having a relatively smaller bore than the remainder thereof toform a bearing, a stem carried by the piston projecting intothe tubularprojection on the cover and '3g-aided by the bearing formed therein, anda c'bnical spring bearing against said piston and cover, t-heconstruction forming a vacuum above the piston as the lubricant isdischarged to the bearing.

In testimony whereof l have hereunto set my hand in the presence of twosubscribing witnesses.

ALBERT C. PAULSMElER.

Witnesses R. N. Fono, W. A. SHEEHAN.

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